1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
-- This sets up the table of C functions
local require, error, assert, tonumber, tostring,
setmetatable, pairs, ipairs, unpack, rawget, rawset,
pcall, type, table, string =
require, error, assert, tonumber, tostring,
setmetatable, pairs, ipairs, unpack, rawget, rawset,
pcall, type, table, string
local abi = require "syscall.abi"
local ffi = require "ffi"
local voidp = ffi.typeof("void *")
local function void(x)
return ffi.cast(voidp, x)
end
-- basically all types passed to syscalls are int or long, so we do not need to use nicely named types, so we can avoid importing t.
local int, long = ffi.typeof("int"), ffi.typeof("long")
local uint, ulong = ffi.typeof("unsigned int"), ffi.typeof("unsigned long")
local function inlibc_fn(k) return ffi.C[k] end
-- Syscalls that just return ENOSYS but are in libc. Note these might vary by version in future
local nosys_calls = {
timer_create = true,
timer_gettime = true,
timer_settime = true,
timer_delete = true,
timer_getoverrun = true,
}
local C = setmetatable({}, {
__index = function(C, k)
if nosys_calls[k] then return nil end
if pcall(inlibc_fn, k) then
C[k] = ffi.C[k] -- add to table, so no need for this slow path again
return C[k]
else
return nil
end
end
})
-- quite a few OpenBSD functions are weak aliases to __sys_ prefixed versions, some seem to resolve but others do not, odd.
-- this is true, but not needed on OpenBSD?
--C.futimes = ffi.C.__sys_futimes
--C.lutimes = ffi.C.__sys_lutimes
--C.utimes = ffi.C.__sys_utimes
--C.wait4 = ffi.C.__sys_wait4
--C.sigaction = ffi.C.__sys_sigaction
return C
|
